Heartbreaking – producing great sadness. Sentence: The heartbreaking news of the accident left everyone in tears.

Homesick – missing home and family very much. Sentence: The young boy felt homesick during his first week at boarding school.

Blockhead – an informal word which means a very stupid person. Sentence: Don't be a blockhead and ignore the good advice given to you.

Law-abiding – obeying and respecting the law. Sentence: As a law-abiding citizen, she always follows the traffic rules.

Overdo – do something to an excessive degree. Sentence: You must not overdo the exercise, or you might injure yourself.

Daydream – think about pleasant things, forgetting about the present. Sentence: He tends to daydream during boring lectures.

Breakdown – an occasion when vehicles/machines stop working. Sentence: Our trip was delayed due to a sudden breakdown of the bus.

Output – something produced by a person, machine or organisation. Sentence: The factory's output has increased significantly this month.